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<head><meta charset="utf-8"><title>1.50 blog post · t-release · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/index.html">t-release</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html">1.50 blog post</a></h3>

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<a name="222097767"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222097767" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222097767">(Jan 08 2021 at 17:07)</a>:</h4>
<p><span class="user-mention" data-user-id="138448">@cuviper</span> wanted to kick this off - <a href="https://github.com/rust-lang/rust/pull/80812">https://github.com/rust-lang/rust/pull/80812</a></p>



<a name="222099051"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222099051" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222099051">(Jan 08 2021 at 17:17)</a>:</h4>
<p>I think talking about union with manuallydrop being safe is good, and we can touch on the stabilization in 1.49 of union's with manuallydrop fields</p>



<a name="222099378"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222099378" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222099378">(Jan 08 2021 at 17:19)</a>:</h4>
<p>sure, that could use an explanation</p>



<a name="222099483"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222099483" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222099483">(Jan 08 2021 at 17:20)</a>:</h4>
<p>slice::fill stabilization seems cool to callout too</p>



<a name="222099647"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222099647" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222099647">(Jan 08 2021 at 17:21)</a>:</h4>
<p>not sure what else</p>



<a name="222099690"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222099690" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222099690">(Jan 08 2021 at 17:21)</a>:</h4>
<p>it's a slow release, especially knowing const-generics are coming next...</p>



<a name="222099783"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222099783" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222099783">(Jan 08 2021 at 17:22)</a>:</h4>
<p>yeah - I think just those two things are a good start, not sure I see much else too notable.</p>



<a name="222111373"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222111373" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222111373">(Jan 08 2021 at 18:58)</a>:</h4>
<p>Intra doc links got about 1000x faster if that counts :)</p>



<a name="222111506"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222111506" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222111506">(Jan 08 2021 at 18:59)</a>:</h4>
<p>(deleted)</p>



<a name="222111596"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222111596" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222111596">(Jan 08 2021 at 18:59)</a>:</h4>
<p>(deleted)</p>



<a name="222111597"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222111597" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Joshua Nelson <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222111597">(Jan 08 2021 at 18:59)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/pull/79682">https://github.com/rust-lang/rust/pull/79682</a></p>



<a name="222112894"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222112894" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222112894">(Jan 08 2021 at 19:10)</a>:</h4>
<p>I don't think it's noticeable for most and we rarely touch on performance</p>



<a name="222112948"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222112948" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> XAMPPRocky <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222112948">(Jan 08 2021 at 19:10)</a>:</h4>
<p><span class="user-mention" data-user-id="232545">@Joshua Nelson</span> You should tag those with <code>relnotes-perf</code>, in the future and I’ll include them in the Internal Only section in the relnotes.</p>



<a name="222113191"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222113191" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> XAMPPRocky <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222113191">(Jan 08 2021 at 19:13)</a>:</h4>
<p>I think the most interesting thing in the release notes is the Option&lt;File&gt; being the same size as File, and think it could expanded on by explaining what is a niche and why it matters.</p>



<a name="222114252"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222114252" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222114252">(Jan 08 2021 at 19:22)</a>:</h4>
<p>yeah, it's sort of niche (heh)</p>



<a name="222114260"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222114260" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222114260">(Jan 08 2021 at 19:22)</a>:</h4>
<p>but seems like something we could touch on</p>



<a name="222265145"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222265145" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> XAMPPRocky <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222265145">(Jan 11 2021 at 07:02)</a>:</h4>
<p>There's also "ops::{Index, IndexMut} are now implemented for fixed sized arrays of any length." that I just included, because it was in the previous relnotes but didn't land until this release. So could be a nice "const generics coming soon™️".</p>



<a name="222286847"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222286847" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222286847">(Jan 11 2021 at 11:43)</a>:</h4>
<p>Yeah, there's still a small chance we don't see const generics hit stable in 1.51 if something comes up last minute; I wouldn't mention a specific release. But noting that impl seems good.</p>



<a name="222286989"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222286989" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> XAMPPRocky <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222286989">(Jan 11 2021 at 11:45)</a>:</h4>
<p>Well that's why said soon™️ and not "next release". <span aria-label="stuck out tongue" class="emoji emoji-1f61b" role="img" title="stuck out tongue">:stuck_out_tongue:</span></p>



<a name="222785932"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222785932" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222785932">(Jan 14 2021 at 21:20)</a>:</h4>
<p><span class="user-mention" data-user-id="138448">@cuviper</span> wanted to check-in that you're feeling good about the topic list proposed in the discussion/thoughts above</p>



<a name="222789677"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/222789677" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#222789677">(Jan 14 2021 at 21:51)</a>:</h4>
<p>yeah, seems fine to me</p>



<a name="224044369"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/224044369" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#224044369">(Jan 26 2021 at 14:17)</a>:</h4>
<p><span class="user-mention" data-user-id="138448">@cuviper</span> I may have missed it, but did you get a chance to open the blog PR yet?</p>



<a name="224076613"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/224076613" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#224076613">(Jan 26 2021 at 17:50)</a>:</h4>
<p><span class="user-mention" data-user-id="116122">@simulacrum</span> I shared this in the meeting: <a href="https://hackmd.io/@cuviper/ryZO_tDyO">https://hackmd.io/@cuviper/ryZO_tDyO</a></p>



<a name="224076661"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/224076661" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#224076661">(Jan 26 2021 at 17:50)</a>:</h4>
<p>but I haven't had time to do more since then</p>



<a name="224076687"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/224076687" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#224076687">(Jan 26 2021 at 17:50)</a>:</h4>
<p>I'll try to get to that today</p>



<a name="224076884"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/224076884" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#224076884">(Jan 26 2021 at 17:52)</a>:</h4>
<p>looks pretty good at quick skim, can leave more detailed feedback later - I think doing so on a PR makes sense.</p>



<a name="224076898"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/224076898" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#224076898">(Jan 26 2021 at 17:52)</a>:</h4>
<p>thanks!</p>



<a name="224273321"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/224273321" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#224273321">(Jan 28 2021 at 01:20)</a>:</h4>
<p><a href="https://github.com/rust-lang/blog.rust-lang.org/pull/771">https://github.com/rust-lang/blog.rust-lang.org/pull/771</a></p>



<a name="225939281"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/225939281" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#225939281">(Feb 11 2021 at 01:50)</a>:</h4>
<p>if there's any more feedback, please let me know soon so I can adjust it tonight</p>



<a name="225939303"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/225939303" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#225939303">(Feb 11 2021 at 01:51)</a>:</h4>
<p>otherwise, the PR should be open to maintainer pushes, so feel free to tweak it at the last minute</p>



<a name="225939328"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/225939328" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> cuviper <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#225939328">(Feb 11 2021 at 01:51)</a>:</h4>
<p>you guys are often running the release before I'm even awake... <span aria-label="zzz" class="emoji emoji-1f4a4" role="img" title="zzz">:zzz:</span></p>



<a name="225942719"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/225942719" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#225942719">(Feb 11 2021 at 02:50)</a>:</h4>
<p><span class="user-mention" data-user-id="138448">@cuviper</span> left one comment - <a href="https://github.com/rust-lang/blog.rust-lang.org/pull/771#pullrequestreview-588219859">https://github.com/rust-lang/blog.rust-lang.org/pull/771#pullrequestreview-588219859</a></p>



<a name="225942763"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/225942763" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#225942763">(Feb 11 2021 at 02:50)</a>:</h4>
<p>but we can likely resolve it tomorrow if you don't get to it</p>



<a name="225942771"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/241545-t-release/topic/1.50%20blog%20post/near/225942771" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/241545-t-release/topic/1.2E50.20blog.20post.html#225942771">(Feb 11 2021 at 02:50)</a>:</h4>
<p>thanks for getting it into shape :)</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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